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← Area code 313

313-620 phone numbers

Numbers 313-620-0000 to 313-620-9999 are assigned to Boost Subscriberco L.L.C. (rate centre DETROITZN3, MI, NANPA abbreviation). 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 313-620-4xxx, 313-620-5xxx, 313-620-6xxx, 313-620-8xxx, 313-620-9xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 313-620